自转向酸液在海上油田的应用

Application of Self-Steering Acid in Offshore Oil Field

根据海上油田储层非均质性强、渗透率极差较大、后期频繁作业造成的储层污染等特点优选出适合海上作业的均匀酸化改造工艺技术即新型酸化自转向技术,并对其性能进行室内评价。结果表明:VWN抗温性能好,转向能力强,可以暂堵高渗透岩心,有效地改造低渗透岩心,因此,前置转向酸+主体酸的自转向酸液体系可以有效地运用于海上油田的酸化改造。

According to the shortcoming of severe heterogeneity, low permeability, low natural productivity and vulnerable to external fluid pollution of offshore oilfield reservoirs, a new acidification self-diverting technology for homogeneous acidification transformationwas suggested, and its performancewas evaluated. The result confirmed its good performance in resistance to temperature and diverting, temporarily blocking the high permeability core, and effectively improving low permeability core. Thus, the self-diverting acid system can be effectively applied to the acidification of offshore oilfield.